Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide
In this study, we address the catalytic performance of variously sized Pt nanoparticles (NPs) (from 1.7 to 2.9 nm) supported on magnéli phase titanium oxide (MPTO, Ti<sub>4</sub>O<sub>7</sub>) along with commercial solid type carbon (VXC-72R) for oxygen reduction reaction (OR...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/4/829 |
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| author | Didem C. Dogan Jiye Choi Min Ho Seo Eunjik Lee Namgee Jung Sung-Dae Yim Tae-Hyun Yang Gu-Gon Park |
| author_facet | Didem C. Dogan Jiye Choi Min Ho Seo Eunjik Lee Namgee Jung Sung-Dae Yim Tae-Hyun Yang Gu-Gon Park |
| author_sort | Didem C. Dogan |
| collection | DOAJ |
| description | In this study, we address the catalytic performance of variously sized Pt nanoparticles (NPs) (from 1.7 to 2.9 nm) supported on magnéli phase titanium oxide (MPTO, Ti<sub>4</sub>O<sub>7</sub>) along with commercial solid type carbon (VXC-72R) for oxygen reduction reaction (ORR). Key idea is to utilize a robust and electrically conductive MPTO as a support material so that we employed it to improve the catalytic activity and durability through the strong metal-support interaction (SMSI). Furthermore, we increase the specific surface area of MPTO up to 61.6 m<sup>2</sup> g<sup>−1</sup> to enhance the SMSI effect between Pt NP and MPTO. After the deposition of a range of Pt NPs on the support materials, we investigate the ORR activity and durability using a rotating disk electrode (RDE) technique in acid media. As a result of accelerated stress test (AST) for 30k cycles, regardless of the Pt particle size, we confirmed that Pt/MPTO samples show a lower electrochemical surface area (ECSA) loss (<20%) than that of Pt/C (~40%). That is explained by the increased dissolution potential and binding energy of Pt on MPTO against to carbon, which is supported by the density functional theory (DFT) calculations. Based on these results, we found that conductive metal oxides could be an alternative as a support material for the long-term fuel cell operation. |
| first_indexed | 2024-03-10T12:57:38Z |
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| id | doaj.art-f89985a6d8dd4ae39de3069e02abd7d9 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T12:57:38Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f89985a6d8dd4ae39de3069e02abd7d92023-11-21T11:48:44ZengMDPI AGNanomaterials2079-49912021-03-0111482910.3390/nano11040829Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium OxideDidem C. Dogan0Jiye Choi1Min Ho Seo2Eunjik Lee3Namgee Jung4Sung-Dae Yim5Tae-Hyun Yang6Gu-Gon Park7Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaFuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaFuel Cell Research & Demonstration Center, Korea Institute of Energy Research, Buan-gun 56332, KoreaFuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaFuel Cell Research & Demonstration Center, Korea Institute of Energy Research, Buan-gun 56332, KoreaFuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaFuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaFuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaIn this study, we address the catalytic performance of variously sized Pt nanoparticles (NPs) (from 1.7 to 2.9 nm) supported on magnéli phase titanium oxide (MPTO, Ti<sub>4</sub>O<sub>7</sub>) along with commercial solid type carbon (VXC-72R) for oxygen reduction reaction (ORR). Key idea is to utilize a robust and electrically conductive MPTO as a support material so that we employed it to improve the catalytic activity and durability through the strong metal-support interaction (SMSI). Furthermore, we increase the specific surface area of MPTO up to 61.6 m<sup>2</sup> g<sup>−1</sup> to enhance the SMSI effect between Pt NP and MPTO. After the deposition of a range of Pt NPs on the support materials, we investigate the ORR activity and durability using a rotating disk electrode (RDE) technique in acid media. As a result of accelerated stress test (AST) for 30k cycles, regardless of the Pt particle size, we confirmed that Pt/MPTO samples show a lower electrochemical surface area (ECSA) loss (<20%) than that of Pt/C (~40%). That is explained by the increased dissolution potential and binding energy of Pt on MPTO against to carbon, which is supported by the density functional theory (DFT) calculations. Based on these results, we found that conductive metal oxides could be an alternative as a support material for the long-term fuel cell operation.https://www.mdpi.com/2079-4991/11/4/829polymer electrolyte fuel cellscatalyst supportmagnéli phase titanium oxidesize effectdensity functional theory |
| spellingShingle | Didem C. Dogan Jiye Choi Min Ho Seo Eunjik Lee Namgee Jung Sung-Dae Yim Tae-Hyun Yang Gu-Gon Park Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide Nanomaterials polymer electrolyte fuel cells catalyst support magnéli phase titanium oxide size effect density functional theory |
| title | Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide |
| title_full | Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide |
| title_fullStr | Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide |
| title_full_unstemmed | Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide |
| title_short | Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide |
| title_sort | enhancement of catalytic activity and durability of pt nanoparticle through strong chemical interaction with electrically conductive support of magneli phase titanium oxide |
| topic | polymer electrolyte fuel cells catalyst support magnéli phase titanium oxide size effect density functional theory |
| url | https://www.mdpi.com/2079-4991/11/4/829 |
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